Under muwāfaqah, the textbook shows that Form II can correspond in meaning to Form I, Form IV, or Form V in particular expressions:
تَمَرْتُهُ وَتَمَّرْتُهُ
Translation: I gave him dates; the two forms correspond in this use.
تَمَّرَ وَأَتْمَرَ
Translation: The fresh date dried; the Form II and Form IV expressions correspond in this sense.
تَرِسَ وَتَتَرَّسَ
Translation: He used a shield; both can express the use of a shield.
Correspondence is usage-specific, not a claim that every root has identical meanings in all forms.
LessonsThirteen Semantic Properties of Form II (Tafʿīl): From Causation and Multiplicity to Independent MeaningsQuiz
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Property 12: Matching Meanings Across Forms
Under muwāfaqah, the textbook shows that Form II can correspond in meaning to Form I, Form IV, or Form V in particular expressions:
تَمَرْتُهُ وَتَمَّرْتُهُ
Translation: I gave him dates; the two forms correspond in this use.
تَمَّرَ وَأَتْمَرَ
Translation: The fresh date dried; the Form II and Form IV expressions correspond in this sense.
تَرِسَ وَتَتَرَّسَ
Translation: He used a shield; both can express the use of a shield.
Correspondence is usage-specific, not a claim that every root has identical meanings in all forms.